Register detector



Feb. 11, 1930. J; R BLAINE 1,746,632

REGISTER DETECTOR Filed May 3, 1924 2 Sheets-$heet 1 11,, 930. J. BLAINE. 1,746,632

REGISTER DETECTOR med may 5, 1924 2 Sheets-Sheet 2 Patented Feb. 11, 1930 UNITED STATES PATENT @FFICE JOSEPH n-BLAInE, or OAK PAR-K, rumors, ASSIGNOR T MIEI-ILE rnnvrrne rnnss &

MANUFACTURING COMPANY, or CHICAGO, ILLiNoIs, A CORPORATION OF ILLINOIS REGISTER DETECTOR Application fi1ed- May 3,

This invention relates to printing presses and more particularly to front register detector mechanism therefor.

One object ofthe invention is to provide simple, reliable and efficientdetector means which will automatically tripthe press if a fed sheet is not properly registered or if no sheet is fed.

Another object is to provide simple means for preventing constant tripping action of the parts after the press is once tripped, thereby preventing actuation of the parts involved.

Another object is to provide simple means to prevent tripping action on the off rev-olution of atwo revolution type of press.

Another object is to provide printing press detector and tripping mechanism adapted to meet all of the requirements under service conditions.

These and other objects are accomplished by means of the arrangement disclosed on the accompanying sheets of drawings, in which Figure l'is a fragmentary side elevation, parts being in section, of a printing press embodying my invention;

Figure 2 is an enlarged fragmentary side view, parts being in section, Of the impression cylinder and associated detector and trip mechanism; a

Figure 3 is a view taken in the plane of line 33 of Figure 2;

Figure 4 is a detail top plan view of the detector mechanism; and

Figure 5 is a sectional view taken in the plane of line 55 of Figure 4.

The various novel features of the invention will. be apparent from the. following description and drawings, and will be particularly pointed out in the appended claims.

The invention is illustrated in connection with what is known as a two revolution type of press in which the cylinder makes two revolutions for each printing cycle. The

" impression cylinder 10 not only rot-ates, but

has a vertical reciprocatory movement, there being one complete down and up movement for two revolutions ofthe cylinder. Each of the cylinder journals 11, only one of which is shown, is mounted in ajournal box 12 which 1924. Serial No. 710,755.

falls and rises with the cylinder. A sheet at or, in other words, at the time that cylinder grippers grip the sheet preparatory to causmg an lmpression to be made.

the paper to the lower edges of the front stops 14. Also mounted on the front guide stop 14 is a sheet or front register detector includ ing a finger 21 secured to a bracket 22 pivot-- ally mounted at 23 on the front guide stop 14. In this connection it willbe noted that when the front guide stop 14 is raised to permit the passage of a fed sheet thereunder, the guide means and front detector means 21 also rise with the front guide stop 14. Secured to the finger pivot 23 and extending therefrom is a hook 24 which cooperates with a shouldered portion 25 011 a spring pressed slide bar 26, said bar having a second shoulder or pro jection 27 which cooperates with a finger 28 mounted to oscillate with a rock shaft 29, the spring 3' tending to force the bar toward the left as viewed in Figures 2 and 4. As

shown in Figure 1 of the drawings, the detector finger 21 has been moved forwardly by a sheet 30, causing the detector 22 to rotate in a clockwise direction for raising the hook 24 out of engagement with, or out of the path of movement of the shouldered portion 25 on the spring pressed slide bar 26. Under such conditions, that is, when the hook 24 is raised the fed sheet will receive its impression and the press will not be tripped. However, if no Guide means r 20 1s secured to the front stop 14 for directing be raised and the press will be tripped by mechanism to be considered hereinbelow.

The tripping connection includes an arm 31 secured to the rock shaft 29 to which arm one end of the link 32 is pivoted, the other end of which link is pivoted to one arm 33 of a three-armed bell crank lever 34 pivoted to a frame part at 35. The link 32 passes through an aperture in a guide support 36, against the under-surface of which a spring 37 coiled around the link abuts, the opposite end of the spring 37 pressing against a collar 38 on the link 32, the effect being that the spring 37 tends to rock the shaft 29and accordingly the pin 28 in a clockwise direction, as viewed in Figures 1 and 2, so that a roller 39 carried in a second arm40 of the bell crank lever 34 may be pressed against and follow a cam 41 rotatable with the journal 11. The third arm 42 of the bell crank lever 34 is pivotally and slidably connected to a link 43 which in turn is connected to a movably mounted bar 44 one end of which is pivotally connected to one arm 45 of a bell crank lever 46, the

other arm 47 of which is connected to a link 48 which in turn is connected to a bell crank lever 49 having one arm with a hook 50 normally preventing a clockwise movement of a lever 51 pivoted at 52 and bearing upon an other lever 53 secured to a rock shaft which is connected to the ultimate parts for tripping the press. A spring 55 presses downwardly upon the lever 51, tending to trip the press and a lighter spring 56 holds the lever 53 in a predetermined position and also holds up a trip pedal 57 connected to the lever A second manual trip lever 58 is provided at the point where the arm 47 is operatively connected to the link 48. It will be noted that the bar 44 has a shoulder 59 which at times is engaged by a projection 60 on a plate 61 adjustably secured to the journal 11. The plate 61 of course moves vertically up and down with the journal 11 in addition to rotating therewith. From the arrangement described, it will be apparent that whenever the projcction 60 in its counterclockwise rotation engages the shoulder 59 the bar 44 will be shifted to the left, as viewed in Figure 2, for causing a trippingof the press through the connections hereinabove described. If the shoulder 59 is removed from the path of movement of the projection 60 before the projection reaches that. point of its cycle of rotation, the tripping connections will remain undisturbed and the press will not be tripped. In this connection the detector hook 24 has a direct relation with respect to the bar 44, for if the detector hook 24 is raised, the bar 26 will be permitted to slide to the left under the tension of spring 37 and the rock shaft 29 will be permitted to rotate a given amount in a clockwise direction, and the bell crank lever '34, under the tension of the spring 37, will be permitted to rotate a given amount in a counter-clockwise direction for permitting the roller 39 to follow the cam 41 and for positively raising the bar 44 and accordingly, its shoulder 59 out of the path of movement of the projection 60. In other words, under the conditions described, with the detector hook 24 raised the shoulder 59 will be raised out of the path of movement of the projection 60 for preventing the tripping of the press. On the other hand, however, if the detector hook 24 is not raised, due to no sheet being fed, or improper front register, the bar 44 and, accordingly its shoulder 59, will not be raised out of the path of movement of the projection 60 and the bar 44 will be thrust to the left for tripping the press through the connections described.

When the press is once tripped, it remains tripped until reset, by depressing pedal 70, for the purpose of preventing useless trippin actions and the consequent wear of parts involved. It is understood, of course, that the spring 55 is the element which holds the right hand ends of the trip levers 51 and 53 down and accordingly maintains the hook 50 ineffective. But the wear of parts referred to are those parts including the projection 60, shoulder 59, and other cooperating members from there to the detector linger 21. With respect to the holding of parts in tripped position when the press has been tripped, attention is called to the fact that the left hand end of the bar 44 is provided with a shoulder 61 which, when the bar 44 is thrust to the left, engages a projection 62 on the lever arm 40 for preventing said lever arm 40 from moving in a counterclockwise direction and accordingly preventing the roller 39 from passing into the depressed portion of the cam 41. If, under trip conditions the roller 39 were permitted to pass into the depressed portion of the cam 41, it will be appreciated that the bar 44 would then be raised and shortly thereafter again lowered so that the shoulder 59 would again pass into the path of movement of the projection 60 which in turn would cause a second tripping action of those parts in spite of the fact that the press already is in tripped condition. It is the useless tripping actions and the consequent wear of said parts, after the press has been tripped, which the shoulder 61 on the bar 44, and lug 62 on arm 40, prevents.

Additional means are provided to prevent a tripping action on the off revolution of the cylinder, it being understood that the cylinder makes two revolutions in a single printing cycle. The means referred to includes a lug 63 on the inner side of lever arm 40 and a lug 64 on the outer side of journal box 12. As shown in Figure 2 of the drawings, the cylinder 10 is in its up position and the lugs 64 and 63 are out of horizontal alignment and said lugs are not functioning. However, when the cylinder moves downwardly on its as has already been stated the press shown is jtwo revolutions of the cylinder 10 for each printing cycle, a cycle including a vertlcal reciprocatlon, or an up and down movement of fofli revolution, the lug 64 passes into horizontal alignment with lug 63, thereby preventing a counterclockwise movement of the lever arm and preventing tripping action of the partsi At this time the plate 61 is in its lowered position and accordingly projection 60 does notengage shoulder 59, it being understood that plate 61moves up and down withjournalllQ This lug arrangementfincluding the lugs 64 and 63, together with the up and down movement ofthe cylinder,accomplishes exactly what a two to one reduc- 'tion gear would accomplish without additional gearing, and by means of this arrangement the use of reduction gearing isavoided.

To summarize the operation of thepress;

of the two revolution type, whereinthere are said cylinder. It'will be appreciated that when the cylinder is .downthe sheet 30 re-. ceives its impression, and the press is not tripped, tripping of the press causing the cylinder to remain in up position, wherein no impression is made on the sheet.

are fed one at a'timei over the board 13 to- 5 Ward the cylinder 10, but come in contact with and are stopped'temporarily by the stop members 14. At the proper time in the' cycle,tha.t is, when the cylinder is in up position, cam 19 revolving with the cylinder 10 operates the arm 17 to automatically raise the front stop members 14 at which time the cylinder grippers grip the sheet preparatory to causing an impression to be made, which impression can then be made on the next revolution wherein the cylinder is in down position. In this connection, when the sheet is fed down over the board 18, it will contact e the fingers 21 moving the same to thereby cause the hook 524 to be raised, at which time p the sheet will be moved with the cylinder and tripped.

; will receive its impression, the cylinder being indown positiomand the press will not be the sheet is so fed as notto register with the front guide stops 14, fingers 21 willnot be moved, but will remain in the position as shown in Figure 2, with the result that the hook 24 will not be raised and the press will be tripped, thatis, the cylinder lOwill not be permitted to reciprocate, but will merely rotatein up position. When such operation ocours, that is, when the hook 24 is not freed or not raised, the cylinder in revolving will cause the projection 60 on the plate 61 to come in contact with the shoulder 59 on the 1 bar 44 to move said bar toward the left as viewed in Figure 2, which will operate through the bell crank 46 to raise the link 48 tofree the hook 50 of the bell crank lever 49 from its engagement with the lever 51. The spring will then depress the levers 51 and Sheets 30 1 However, if 'no sheet is fed, or if 53 in a clockwise direction to trip the press and the press will remain tripped until reset "by depressing the pedal tothereby cause engagement between the hook 50 and the lever 51,spring 56 maintaining lever 53 in normal position when the press is not tripped. When the press is once tripped, the shoulder 61* of the lever 44 isthrust to the left and engages a projection 62on the inside of the lever arm 40, which will prevent the arm 40 from moving in a counter-clockwise direction, and accordingly willprevent the roller 39 from passing into the depressed portion of the cam 41, it being understood that the cams 41 and 19 are in the relative position as indicated in Figure 2. By preventing the roller from following the cam 41, bar 44is prevented from being raised andlowered so that the shoulder 59 will not again beoperatedby the projection 60, so that these parts journal box 12 passes into horizontal alignment with thelug 63 on the inner side of the lever 40 to thereby prevent a counter-clockwise movement of the lever arm-40 to thereby prevent tripping action of these parts. At this time the plate 61 is in its lowered position and accordingly projection 60 does not engage shoulder 59. Undernormal action,

that is, wherethe sheet 30 is correctly fed, causing the hook 24 to be raised. permitting the cylinder grippers to move the sheet for its impression in the downward position of the cylinder'when the book 24 is raised it releases the slide bar'26, in which case the shaft 29 may rotate in a clockwise direction to permit the arm 40 to follow the cam 41, which will raise and lower the bar 44 to prevent tripping action of the parts until some condition preQ vails, such as incorrect feeding-of the sheet to cause tripping operation of the parts as already described.

In interpreting theclaims in which the expression trip control member is used, the bar 44 is referred to and where the expression reciprocatory member or slide memher is used, the member 26 1s reterredto.

It is my intension to cover all modifications of the invention falling within the spirit and scope of the followingclaims.

I claim: r

1. In a printing press, the combination of a guide stop member, a slide member movably associated therewith, and a detector operatively associated with saidslide member whereby when said slide member and detector are operatively connected tripping of the press results. I

2. In a printing press, the combination of a guide stop member. a slide member mov ably associated therewith, and a detector operatively associated with said slide member whereby when said slide member and detector are operatively connected tripping of the press results and when disconnected the press will be permitted to continue uninterruptedly.

3. In a printing press, the combination of a guide stop member, a detector associated therewith, tripping means associated with said detector, said detector having a detector finger and a hook portion, a slide member operatively associated therewith, and means associated with said detector whereby when said detector is not engaged or not properly engaged by a sheet the hook remains in operative association with said slide member, controlling said tripping means to cause tripping of the press.

4. In a printing press, the combination of a trip, control member, rotatably mounted means for actuating said trip control memfber for tripping the press, and means for per-eventing said trip control member again ing given a tripping action until the press is reset.

:5. In a printing press, the combination of a cylinder, a trip control member, a member rotatable with said cylinder and operable upon said trip control member for moving the latter for tripping the press, and means for preventing said trip control member taking a position in which it may be given another tripping action until after the press has been reset.

6. In a printing press, the combination of a trip control member, a bell crank lever, a connection therebetween whereby said trip control member may be actuated, and means for giving said trip control member a different movement for tripping the press, said bell crank lever and trip control member having cooperating means for preventing said trip control member taking the position wherein it is subject to a second tripping action until after the press is reset.

7. In a printing press which has a cylinder having two revolutions to a single printing cycle, a journal box in which the journal of said cylinder is supported, and a lever cooperating with the tripping mechanism for the press, said journal box and lever having cooperating means thereon to prevent tripping action of parts of the press during the off revolution of the cylinder.

8. In a printing press which has a cylinder having two revolutions to a single printing cycle, a journal box in which the journal of said cylinder is supported, a lever forming a part of the tripping connection for the press, said journal box and lever having cooperating means to prevent tripping action of parts of the press during the oil revolution of the cylinder, and a trip control member operatively associated with said lever, said trip control member and lever having cooperating means to prevent continued tripping action of the tripping parts after the press has been tripped and until the press has been reset.

9. In a printing press having a reciprocating cylinder, tripping mechanism associated with said cylinder, and means associated with said tripping'mechanism and reciprocating with said cylinder for preventing tripping action of parts of the press on the oil revolution. 7

10. In a printing press, the combination of a cylinder having two revolutions to a single printing cycle, tripping mechanism associated with said cylinder, and means including cooperating reciprocating and oscillating members for preventing tripping action of parts of the press on the off revolution.

11. In a printing press, the combination of a cylinder having two revolutions to a single printing cycle, tripping mechanism associated with said cylinder, and means associated with said tripping mechanism and reciprocating with said cylinder for controlling tripping of said press.

12. In a printing press, the combination of a cylinder having two revolutions to a single printing cycle, tripping mechanism associated with said cylinder, means including cooperating reciprocating and oscillating members for controlling tripping action of said press, and means on one of said last named members cooperating with the other of said last named members for preventing consecutive tripping of said press.

13. In a printing press, the combination of a reciprocating cylinder having two revolutions to a single printing cycle, a movable journal box for a journal of said cylinder, means controlled by said cylinder to permit printing, cooperating members associated with said means, one of said members having operative association with a trip control member, the other of said members being actuated upon incorrect feeding to said cylinder, means associated with said cylinder for operating said trip control member to trip said press, resetting means for resetting the press and returning the trip control member to operative position, and cooperating means associated with said journal box and first named cooperating members to prevent continued consecutive tripping of said press.

14. In a printing press, the combination of a reciprocating cylinder having two revolutions to a single printing cycle, a movable journal box for a journal of said cylinder, means controlled by said cylinder to permit printing, cooperating members associated with said means, one of said members having operative association with a trip control member, the other of said members being actuated upon incorrect feeding to said cylinder, means associated with said cylinder for operating said trip control member to trip said press, resetting means for resetting the press and returning the trip control member to operative position, and cooperating means associated with said first namedcooperating members and said trip control members to prevent tripping action of parts of said press on the off revolution.

Signed at Chicago, Illinois, this 8th day of April, 1924.

JOSEPH R. BLAINE. 

